Upstream says don't directly call concat::setup

On ~modern versions of concat, concat::setup isn't to be called directly, and using it logs this warning:
```
Warning: Scope(Class[Concat::Setup]): concat::setup is deprecated as a public API of the concat module and should no longer be directly included in the manifest.
```
Concat 1.0.0 removed the need to include concat::setup, and 1.1.0 added the deprecation warning.

I removed a test that relied on this, couldn't think of where to add some, but I could if you can think of them :)